Implemented a semi-stub for GetProcessPriorityBoost.

dlls/kernel/kernel32.spec

diff --git a/dlls/kernel/kernel32.spec b/dlls/kernel/kernel32.spec
index c38dc44..c572e9d 100644
--- a/dlls/kernel/kernel32.spec
+++ b/dlls/kernel/kernel32.spec
@@ -1002,7 +1002,7 @@
 @ stdcall GetDiskFreeSpaceExW (wstr ptr ptr ptr)
 @ stdcall GetFileAttributesExA(str long ptr)
 @ stdcall GetFileAttributesExW(wstr long ptr)
-@ stub GetProcessPriorityBoost
+@ stdcall GetProcessPriorityBoost(long ptr)
 @ stdcall GetThreadPriorityBoost(long ptr)
 @ stdcall InterlockedCompareExchange (ptr long long)
 @ stdcall InterlockedExchangeAdd (ptr long )

scheduler/process.c

diff --git a/scheduler/process.c b/scheduler/process.c
index c8cc632..35fdb05 100644
--- a/scheduler/process.c
+++ b/scheduler/process.c
@@ -1719,6 +1719,19 @@
 
 
 /***********************************************************************
+ *           GetProcessPriorityBoost    (KERNEL32.@)
+ */
+BOOL WINAPI GetProcessPriorityBoost(HANDLE hprocess,PBOOL pDisablePriorityBoost)
+{
+    FIXME("(%p,%p): semi-stub\n", hprocess, pDisablePriorityBoost);
+    
+    /* Report that no boost is present.. */
+    *pDisablePriorityBoost = FALSE;
+    
+    return TRUE;
+}
+
+/***********************************************************************
  *           SetProcessPriorityBoost    (KERNEL32.@)
  */
 BOOL WINAPI SetProcessPriorityBoost(HANDLE hprocess,BOOL disableboost)